As Archangel mentioned, there's only a Guardian's Blessing that can prevent EXP loss. I cannot change or modify the fact that monsters cause you to lose exp when you die to them, so it's not a change we can ever make.
@DanDaaManYou dont lose EXP when u get killed by an Mob?
As far as i know is the only Item that preventing you from losing EXP the Guardians Blessing (30d).